# File lib/phusion_passenger/abstract_server.rb, line 225
        def stop
                if !started?
                        raise ServerNotStarted, "Server is not started"
                end
                
                begin
                        @owner_socket.write("x")
                rescue Errno::EPIPE
                end
                @owner_socket.close
                @owner_socket = nil
                File.unlink(@socket_filename) rescue nil
                
                # Wait at most 4 seconds for server to exit. If it doesn't do that,
                # we kill it forcefully with SIGKILL.
                if !Process.timed_waitpid(@pid, 4)
                        Process.kill('SIGKILL', @pid) rescue nil
                        Process.timed_waitpid(@pid, 1)
                end
        end